Re: [midatlanticretro] pdp 11/05
> On 02/19/2012 08:19 PM, B. Degnan wrote:WORLD!
> > Speaking of DEC, I just this minute got my PDP 11/05 to print HELLO
> > and the run of ascii characters correctly (not garbled) to my teletypefrom
> > using a simple program toggled into the front panel.
> SuhWEET!! Congrats!
> > I still haven't gotten it to echo characters to the printer typed in
> > the keyboard, hmmm.No I am not. I am using the CPU-based console port.
> Are you using the CPU-based console port, or a DL11? Either way, are
> you certain the interface is actually receiving bytes?
From 000 000 I load the following program. when I run the program: The TTY
buzzes but nothing echos/prints to the screen. If I switch off the TTY
while the program is left running and then switch the TTY back on, the
computer sends a stream of endless FFFFFFF...... chars. I have loaded the
program elsewhere. Also, memory seems to be OK. I am thinking the problem
is the teletype. Any ideas? I think the TTY, which is wired as a stock
ASR 33, is missing some sort of circuit needed for PDP 11 interaction.